How to make special synth sound?

OK so, in a lot of songs I hear there's this reversed-sounding synth. Here is an example (skip to 0:55) --> hXXttps://http://www.youtube.com/watch?v=QnC3wcjVBVIXX (remove the capital X's for some reason the link doesn't show when I post it) how would I make something like that? I have looked online for DAYS and have come up with nothing and I asked the guy who made that song and he didn't tell me... Any ideas?